estimate the answer to 832.21 +23.81 by rounding each number to the nearest tenth
Mathematics · Middle School · Sun Jan 24 2021
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Given:
832.21 + 23.81
Estimate the answer by rounding each number to the nearest tenths.
Solution:
In rounding numbers, it must be taken to note that if the number is greater than or equal to 5 then the succeeding number will be added by 1, hence if the number is less than 5, then the succeeding number will remain the same. Since we are asked to round to tenths we must determine first where tenths d is. The number places are as follow in an ascending order: Ones/units, tens, hundreds, thousands, ten thousands, hundred thousands, millions, hundred millions, and so on. For decimals, the number places starts with; tenths, hundredths, thousandths, ten thousandths, hundred thousandths, and so on. Tenths is located just after the decimal point, thus if the succeeding number is greater than 5 we add 1, if less than then we retain the number as it is.
832.21 = 832.2
23.81 = 23.8
Combine the values.
= 832.2 + 23.8
= 856
Final answer:
= 856